With 3 Valves- The suction ball has three valves used by the elastic force of rubber to help suck the solution into the pipette, which is very easy to use. Powerful Attraction- The quantitative filler pressure pipette has great suction power, is not easy to break, and the liquid is not easy to settle. Use With Pipette- The rubber pipette filling bulb The pipette is used in conjunction with a pipette, a good laboratory assistant. Premium Rubber- The rubber pipette is made of natural rubber, which is corrosion resistant, safer and more durable. Wide Application- Three valve filling bulb is widely used in industrial and mineral labs, agricultural labs, food labs, chemistry labs, etc. Delivery Quantity: 1 Piece Product color: red Product size: 12.5cm